Pump



E L. BROWN May 10, 1932.

PUMP

Filed Aug. 1, 1929 Patented May 10, 1932 UNITED STATES PATENT OFFICEERNEST L. BROWN, or wATnRToWN, MASSACHUSETTS, ASSIGNOR To BETTER-BUILTPUMPS, 11m, or CAMBRIDGE, MAssAcHUsETTs, A CORPORATION on MAssAonUsETTsPUMP Application filed August 1,1929. Serial No. 382,745.

My present invention relates to pumps, and more particularly to a noveland improved pump particularlyadapted for use in the removal anddispensing ofoil and grease from containers, the pump of the presentapplication being particularly applicable to and useful in pump units,such, for example, as that illustrated and described in the prior andcopending application of Simeon Grossman, Serial No. 354,256, filedApril 11, 1929.

An important object of the present invention is the provision of adouble acting, compounding pump, which will be eflicient 16 inoperation, simple to manufacture and assemble, and economical.

Another object of the invention residesin the provision of a pump, bymeans of which a continuous flow or discharge of lubrication,

20 under extremely high pressure, will be effected through the dischargeoutlet.

Another feature of the present invention resides in the particularconstruction ofthe piston utilized, wherein the piston and piston rodare formed as an integral unit.

A still further object of the invention resides in the particulararrangement of connecting rod, and driving means therefor.

Another feature of the invention resides in 13 the means bywhichlaccomplish the compounding action.

When the pump of thepresent application is applied to and utilized inconnection with a pump unit of the type illustrated in sa1d prior andcopending application, very satisfactory results will be attained. It isthe present custom, in handling oils, greases, and lubricants, to shipthe same in steel drums or other containers, having an opening in oneend thereof which is usually closed by a cover. The lubricant isremoved, by the user, from the original container, and placed inindividual pumps or pump units, whence the lubricant is forced ordistributed to the hearings, or other points to be lubricated. Thishandling of the oil or grease, from the originalcontainer to theintermediate'pumping units, is inconvenient, bothersome, wasteful oftime, labor and expense, and frequently results in contamination of thelubricant with dust, dirt, or other foreign V I matter. The pump of mypresent applica-. tron, particularly when utilized in combination withthe pump unit of said prior application, obviates and eliminates thenecessity for any intermediate pumping devices, enabling the user oroperator topump 0r dispense the lubricant directly from the originalcontainer to the hearing or other point to be lubricated.

An electric motor is preferably utilized as the operating means for mynovel pump, and sa1d pump, when thus operated, is capable of deliveringthe lubricant, at the discharge outlet, with tremendous pressure,resulting in rapid and efiicient lubricating of bearings or other pointswhich ordinarily require considerable time and efiort to efiect theirlubrication;

Referring to the drawings,-illustrating a preferred embodiment of thepresent inven- Fig. 1 is a vertical sectional view illustrating mynovelpump utilized in connection with a 'pump'unit in operative position in alubricant container; S

Fig. 2 is a vertical sectional view on the line 22 of Fig. 1;'and

Fig.3 is a bottom plan view of the pump.

Referring now to the drawings,.for a particular description of theinvention, its construction, assembly and operation, my present novelpump comprises a body 1, prefer ably formed as a casting and havingtherein a compartment, divided into twochambers 2 and 3, by a piston i,said piston being preferably formed as an integral part ofthe piston rod5. The normal area of the chamber 2 is reduced by the size of the pistonrod 5 passing therethrough, to such an extent asto provide a compoundingaction, the ratio of the chambers 3 and 2 illustrated inthepresentdrawings, being approximately three to one. A threaded nut 6is screwed into the threaded end of the said compartment, said nuthaving a bar 7 secured thereto, a flange 8 being vertically slidablethrough said bar,

and'a pin 9 being provided to limit the upward movement of said rod 8.Carried at the upper end of the rod 8 is a disc 10, adapted to seat onthe top of the nut 6.

Positioned below the piston 4, in the body 1, is an outlet 11, a valveseat 12 being formed in the outlet, and a ball 13 is adapted to normallycontact on said seat by means of a spring 14, retained in position by athreaded plug 15. Located above the piston 4 is a second outlet 16, avalve seat 17 being positioned in said outlet,- and the ball 18 normallycontacting with said seat 17 through the medium of a coiled spring 19retained in position by a plug 20. Each of the outlets 11 and 16 lead toa common discharge passage 21, a pipe or conduit 22 being threaded intosaid body 1 in communication with said passage 21. The piston rod 5 has.a bearing in the body 1, as illustrated at 22a, a packing gland 23 andnut 24 being provided to prevent leakage of the lubricant out of thechamber 2. The piston 4 is provided with a by-pass chamber 25,

communicating with radial apertures 26, and

' an appertured plug 27 is threaded into the lower end of the piston,said plug having a valve seat 28 therein, on which is adapted tonormally seat a ball 29 by the tension of a coiled spring 30.

The valvebody 1 is secured, as by threading, to the lower end of acylinder 31, the

upper end of said cylinderbeing threaded to a depending flange 32 on acover plate or member 33, and depending through this cylinder is aconnecting rod 34, carrying at its lower end one part 35 of a knuckleioint, a

lock nut 36 being provided to retain the part 35 in position, the otherpart 37 of the knuckle joint is threaded to the upper end of the pistonrod 5, a lock nut 38 being provided to retain said part 37 in position,and a pin 39 uniting the two parts of said knuckle 'oint. V V r J Theupper end of the connecting rod 34 is threaded into an eccentricstrap/l0. the outer race 41 of an antifriction bearing 42 havingapressfit within said strap, and the inner race 43 of said bearinghaving a press fit upon an eccentric 44 which eccentric is carried bv ormay be an integral part of a shaft 45; The shaft 45 has hearings in thejournals 46 of brackets 47 secured to the cover 33 by bolts 48. Keyed tothe shaft 45 is a gear 49 adapt- 7 ed to mesh with and be rotated by apinion 50, said pinion being mounted on the shaft 51 of a motor 52, towhich motor current 1S supplied from' any suitable source of powerthrough the current conducting wires 53.

The motor'52 is mounted on a boss or projection 54, being securedthereto by bolts55, or in any other-desired manner. A flexible hose '56or other lubricant carrying member is affixed to the upper end of thedischarge pipe 22, said pipe being ofl'setfrom its connection at thevalve body 1 in order to pass through the cover plate 33 free of thebracket, 47. i V The operation of my present novel device is simple, andwill be readily understood by 7 those skilled in the art, being brieflyde- V and a supply of lubrication from within the container 57, will besucked into the chamber 3. hen the piston has reached the top of itsstroke, and starts downwardly, the disc 10 will be seated on the nut 6,and lubrication in the chamber 3 will be forced through the outletllinto the discharge passage 21. As the pistondescends, lubricant willbe bypassed past the ball 29, through the chamber 25 and radialapertures 26, into chamber 2.

As the piston eiiects its next upward stroke, the filling of the chamber3 will be accomplished in the same manner, while the lubricant by-passedinto the chamber 2 will be forced upwardly through the outlet 16, andinto the discharge passage 21. Due to the greatly reduced capacity ofthe chamber 2, a compounding action will be effected, the

grease or other lubricant being discharged from the chamber 2 at a muchgreater pressure than the lubricant discharged through the outlet 11,thus resulting in a compounded pressure on the lubricant beingdischarged through the conduit 22 and hose 56. This action of the pumpalso results in a substantially continuous flow or discharge of thelubricant from the container 57 so long as the motor 52 is in operation.The valve body 1 is positioned to a sufficient depth within thecontainer 57 to assure discharge of substantially the entire lubricantcontent of said container, and when said container has been emptied, orsubstantially emptied of lubricant, the entire pump unit, carried by theplate 33, may be removed from said container and transferred to anothercontainer or drum. It will thus be seen that a direct dispensing of thelubricant from within the original.

drum or container to the bearing, housing, or

other point to be lubricated, is eiiected, obviating and eliminating thenecessity for any intermediate handling of the lubricant, and thusgreatly increasing the efliciency and quality of the lubricant suppliedto the point pleted in far less time than is possible in any If existinglubricators of which I am aware.

WVhile I have described my invention as being primarily adapted for usein connection with the dispensing of lubricants, it will be understoodand appreciated that I am not ion limited thereto, but may utilize mynovel pump in connection with the dispensing or transmission of anyfluid or semi-fluid desired.

It will also be appreciated that while I have illustrated and describedthe pump of the present invention as particularly applicable to a unitof the type illustrated and described in the said prior and copendingapplication, Serial No. 354,256, I am not limited thereto, but mayutilize my novel pump in connection or cooperation with other units orother supporting or operating devices.

It will be further understood that while I have necessarily described mypresent invention somewhat in detail, I am not limited thereto, but mayvaryvthe size, shape, and arrangement of parts, within reasonably widelimits without departing from the spirit of the invention.

My invention is further described and defined in the form of claims asfollows:

1. A pump including a casing having a piston chamber, a pistonreciprocal within said chamber, a piston rod extending from one end ofsaid piston, said piston having a passage formed therethrough and saidpiston rod having a laterally extending duct providing communicationbetween said passage and the end of the piston chamber in which thepiston rod operates, means for reciprocating said piston, a check valveopening in the direction of said end of said chamber controlling flow offluid through said passage and said duct, an inwardly opening checkvalve controlling inlet of fluid to the other end of said pistonchamber, a boss integral with said piston casing at one side thereof,said boss having a fluid passage extending longitudinally therethroughand open at one end of said boss, said casing and said boss havinglateral outlet passages communicating with said piston chamber beyondthe limits of the piston movement in each direction, respectively, andwith said fluid passage in said boss, outwardly opening check valvescontrolling said outlet passages, and a discharge conduit connected tosaid boss and communicating with the open end of the fluid passagetherein.

2. A lubricant dispensing pump, compris ing a casing having a pistonchamber therein, a piston reciprocal within saidchamber, a piston rodextending from one end of said piston, said piston having a passageformed therethrough and said piston rod having a laterally extendingduct providing communication between said passage and the end of thepiston chamber in which the piston rod operates, means for reciprocatingsaid piston, a check valve opening in the direction of said end of saidchamber controlling the flow of lubricant through said passage and saidduct, an inwardly opening check valve controlling inlet of lubricant tothe other end of said piston chamber, said casing having adjacentlateral outlet passages communicating with said piston chamber above andbelow said piston, outwardly opening check valves controlling saidoutlet passages, and a discharge conduit connected with said adjacentoutlet passages.

3. A lubricant dispensing pump, comprising a casing having a pistonchamber therein, a piston reciprocal within'said chamber, a piston rodextendingfrom one end of said piston, said piston having a passageformed therethrough and said piston rod having a duct providingcommunication between said passage and the end of the piston chamber inwhich the piston rod operates, means for reciprocating said piston, acheck valve opening in the direction of said end of said chambercontrolling the flow of lubricant through said passage and said duct, aninwardly opening check valve controlling inlet of lubricant to the otherend of said piston chamber, said casing having lateral outlet passagescommunicating with said piston chamber above and below said piston,outwardly opening check valves controlling said outlet passages, and adischarge conduit connected with said adjacent outlet passages.

In testimony whereof, I have signed my name to this specification.

ERNEST L. BROWN.

